Behset's syndrome is a multisystem disorder with unknown etiology. Clinical
ly it is mostly seen as a systemic vasculitis; almost 30% of the patients h
ave vascular involvements, and most of these are venous thrombosis and arte
rial aneurysms. Obstructions of the femoral and tibial arteries have also b
een reported in the literature. The authors present here a patient with Beh
cet's syndrome who had pseudoaneurysms on both femoral arteries after aorto
bifemoral bypass surgery.